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package org.apache.taglibs.standard.lang.jstl.test;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import org.apache.taglibs.standard.lang.jstl.Evaluator;
import org.apache.taglibs.standard.lang.jstl.test.beans.Factory;
/**
*
* <p>This runs a series of tests specifically for the evaluator. It
* parses and evaluates various expressions in the context of a test
* PageContext containing preset data, and prints out the results of
* the evaluations.
*
* <p>The expressions are stored in an input text file, where one line
* contains the expression and the next line contains the expected
* type. Blank lines and lines that start with # are ignored. The
* results are written to an output file (blank lines and # lines are
* included in the output file). The output file may be compared
* against an existing output file to do regression testing.
*
* @author Nathan Abramson - Art Technology Group
* @version $Change: 181181 $$DateTime: 2001/06/26 09:55:09 $$Author: jluehe $
**/
public class EvaluationTest
{
//-------------------------------------
// Properties
//-------------------------------------
//-------------------------------------
// Member variables
//-------------------------------------
//-------------------------------------
/**
*
* Constructor
**/
public EvaluationTest ()
{
}
//-------------------------------------
/**
*
* Runs the tests, reading expressions from pIn and writing the
* results to pOut.
**/
public static void runTests (DataInput pIn,
PrintStream pOut)
throws IOException
{
PageContext context = createTestContext ();
while (true) {
String str = pIn.readLine ();
if (str == null) break;
if (str.startsWith ("#") ||
"".equals (str.trim ())) {
pOut.println (str);
}
else {
String typeStr = pIn.readLine ();
pOut.println ("Expression: " + str);
try {
Class cl = parseClassName (typeStr);
pOut.println ("ExpectedType: " + cl);
Evaluator e = new Evaluator ();
Object val = e.evaluate ("test", str, cl, null, context);
pOut.println ("Evaluates to: " + val);
if (val != null) {
pOut.println ("With type: " + val.getClass ().getName ());
}
pOut.println ();
}
catch (JspException exc) {
pOut.println ("Causes an error: " + exc);
}
catch (ClassNotFoundException exc) {
pOut.println ("Causes an error: " + exc);
}
}
}
}
//-------------------------------------
/**
*
* Finds the class for a class name, including primitive names
**/
static Class parseClassName (String pClassName)
throws ClassNotFoundException
{
String c = pClassName.trim ();
if ("boolean".equals (c)) {
return Boolean.TYPE;
}
else if ("byte".equals (c)) {
return Byte.TYPE;
}
else if ("char".equals (c)) {
return Character.TYPE;
}
else if ("short".equals (c)) {
return Short.TYPE;
}
else if ("int".equals (c)) {
return Integer.TYPE;
}
else if ("long".equals (c)) {
return Long.TYPE;
}
else if ("float".equals (c)) {
return Float.TYPE;
}
else if ("double".equals (c)) {
return Double.TYPE;
}
else {
return Class.forName (pClassName);
}
}
//-------------------------------------
/**
*
* Runs the tests, reading from the given input file and writing to
* the given output file.
**/
public static void runTests (File pInputFile,
File pOutputFile)
throws IOException
{
FileInputStream fin = null;
FileOutputStream fout = null;
try {
fin = new FileInputStream (pInputFile);
BufferedInputStream bin = new BufferedInputStream (fin);
DataInputStream din = new DataInputStream (bin);
try {
fout = new FileOutputStream (pOutputFile);
BufferedOutputStream bout = new BufferedOutputStream (fout);
PrintStream pout = new PrintStream (bout);
runTests (din, pout);
pout.flush ();
}
finally {
if (fout != null) {
fout.close ();
}
}
}
finally {
if (fin != null) {
fin.close ();
}
}
}
//-------------------------------------
/**
*
* Performs a line-by-line comparison of the two files, returning
* true if the files are different, false if not.
**/
public static boolean isDifferentFiles (DataInput pIn1,
DataInput pIn2)
throws IOException
{
while (true) {
String str1 = pIn1.readLine ();
String str2 = pIn2.readLine ();
if (str1 == null &&
str2 == null) {
return false;
}
else if (str1 == null ||
str2 == null) {
return true;
}
else {
if (!str1.equals (str2)) {
return true;
}
}
}
}
//-------------------------------------
/**
*
* Performs a line-by-line comparison of the two files, returning
* true if the files are different, false if not.
**/
public static boolean isDifferentFiles (File pFile1,
File pFile2)
throws IOException
{
FileInputStream fin1 = null;
try {
fin1 = new FileInputStream (pFile1);
BufferedInputStream bin1 = new BufferedInputStream (fin1);
DataInputStream din1 = new DataInputStream (bin1);
FileInputStream fin2 = null;
try {
fin2 = new FileInputStream (pFile2);
BufferedInputStream bin2 = new BufferedInputStream (fin2);
DataInputStream din2 = new DataInputStream (bin2);
return isDifferentFiles (din1, din2);
}
finally {
if (fin2 != null) {
fin2.close ();
}
}
}
finally {
if (fin1 != null) {
fin1.close ();
}
}
}
//-------------------------------------
// Test data
//-------------------------------------
/**
*
* Creates and returns the test PageContext that will be used for
* the tests.
**/
static PageContext createTestContext ()
{
PageContext ret = new PageContextImpl ();
// Create some basic values for lookups
ret.setAttribute ("val1a", "page-scoped1", PageContext.PAGE_SCOPE);
ret.setAttribute ("val1b", "request-scoped1", PageContext.REQUEST_SCOPE);
ret.setAttribute ("val1c", "session-scoped1", PageContext.SESSION_SCOPE);
ret.setAttribute ("val1d", "app-scoped1", PageContext.APPLICATION_SCOPE);
// Create a bean
{
Bean1 b1 = new Bean1 ();
b1.setBoolean1 (true);
b1.setByte1 ((byte) 12);
b1.setShort1 ((short) -124);
b1.setChar1 ('b');
b1.setInt1 (4);
b1.setLong1 (222423);
b1.setFloat1 ((float) 12.4);
b1.setDouble1 (89.224);
b1.setString1 ("hello");
b1.setStringArray1 (new String [] {
"string1",
"string2",
"string3",
"string4"
});
{
List l = new ArrayList ();
l.add (new Integer (14));
l.add ("another value");
l.add (b1.getStringArray1 ());
b1.setList1 (l);
}
{
Map m = new HashMap ();
m.put ("key1", "value1");
m.put (new Integer (14), "value2");
m.put (new Long (14), "value3");
m.put ("recurse", b1);
b1.setMap1 (m);
}
ret.setAttribute ("bean1a", b1);
Bean1 b2 = new Bean1 ();
b2.setInt2 (new Integer (-224));
b2.setString2 ("bean2's string");
b1.setBean1 (b2);
Bean1 b3 = new Bean1 ();
b3.setDouble1 (1422.332);
b3.setString2 ("bean3's string");
b2.setBean2 (b3);
}
// Create the public/private beans
{
ret.setAttribute ("pbean1", Factory.createBean1 ());
ret.setAttribute ("pbean2", Factory.createBean2 ());
ret.setAttribute ("pbean3", Factory.createBean3 ());
ret.setAttribute ("pbean4", Factory.createBean4 ());
ret.setAttribute ("pbean5", Factory.createBean5 ());
ret.setAttribute ("pbean6", Factory.createBean6 ());
ret.setAttribute ("pbean7", Factory.createBean7 ());
}
// Create the empty tests
{
Map m = new HashMap ();
m.put ("emptyArray", new Object [0]);
m.put ("nonemptyArray", new Object [] {"abc"});
m.put ("emptyList", new ArrayList ());
{
List l = new ArrayList ();
l.add ("hello");
m.put ("nonemptyList", l);
}
m.put ("emptyMap", new HashMap ());
{
Map m2 = new HashMap ();
m2.put ("a", "a");
m.put ("nonemptyMap", m2);
}
m.put ("emptySet", new HashSet ());
{
Set s = new HashSet ();
s.add ("hello");
m.put ("nonemptySet", s);
}
ret.setAttribute ("emptyTests", m);
}
return ret;
}
//-------------------------------------
// Main method
//-------------------------------------
/**
*
* Runs the evaluation test
**/
public static void main (String [] pArgs)
throws IOException
{
if (pArgs.length != 2 &&
pArgs.length != 3) {
usage ();
System.exit (1);
}
File in = new File (pArgs [0]);
File out = new File (pArgs [1]);
runTests (in, out);
if (pArgs.length > 2) {
File compare = new File (pArgs [2]);
if (isDifferentFiles (out, compare)) {
System.out.println ("Test failure - output file " +
out +
" differs from expected output file " +
compare);
}
else {
System.out.println ("tests passed");
}
}
}
//-------------------------------------
static void usage ()
{
System.err.println ("usage: java org.apache.taglibs.standard.lang.jstl.test.EvaluationTest {input file} {output file} [{compare file}]");
}
//-------------------------------------
}